Boiler-tube-cleaner nozzle.



H. GASSIDY.

BOILER TUBE CLEANER NOZZLE.

APPLIGATIQN FILED MAR.27,1912.

1,057,77.. Patented Apr. 1, 12H3.

HUGH CASSIDY, OF BROOKLYN, NEW YORK.

BOILER-TUBE-CLEANER NOZZLE To all whom it may concer/n.: Y

Be it known that I, HUGH CAssIDY, a citizen of the United States, and resident of Brooklyn, in the county otKings and State of New York, have invented certain new and useful improvements in Boiler- '.lube-Cleaner Nozzles, of which the following is a specification.

This invention relates to a nozzle for blowing out boiler tubes with steam and air in the manner described in my Patent No. 1,920,635 issued to me March 19, 1912.

The object of the present invention is to provide a. nozzle havingv a very simple construction enabling it. to be readily manufactured, and having a special form facilitating the entrainin of air into the tube to which the nozzle is applied by the torce of a central jet of steam. The construction of the nozzle is such as to insure an adequate supply' of air, and furthermore the v* air openings are arranged sorthat the incoming air is directed along-the'vwall -ot the..

tube.

A further object of the invention construct the nozzle so as to insure a plentiful supply of air around the lip ot the tube.-

The invention consists in the construction and combination of'parts to be moretully described hereinafter, and particularly set forth in the claims.

In the drawing which fully illustrates my invention, Figure 1 is va longitudinal central section througha nozzle constructed according to my invention and through the end of the tube to which the device is represented as being applied. Fig. 2 is an lelevation looking into the nozzle from the rear-With the steam supply tube removed.-

Referring more particularly to the parts, 1 represents the nozzle which is of conical outline, presenting a conical base ring or open conical'sliell 2 and a central hub 3. This cent-ral hub 3 has a conical tace 4 on its inner or forward side and its butt end is formed with a conical face 5 which tapers in a reverse direction, that is, the conical wall 5 diverges toward the small end ot the nozzle. The inner end ot the nozzle is formed into a tip or circular boss`4 6' which is of slightly 'smaller diameter than the forward end of the onical hub 8. The ring 2 is connected withthe hub 3 by lougitudt nal ribs 7 which extend back from the sides of the hub 3 and imite integrally with the hub`. These ribs also extend on the Specicationof Letters Patent.

Application led March 27, 1912.

Patented Apr. 1, 1913.

seriai No. 686,610.

outside of the ring 2 to which they unite integrally- -'l`he ring 2 is displaced cousiderably toward the rear of the nozzle with respect to the hub 3, so that a plurality ot arc shaped openings 8 are formed between the ribs as indicated in'Fig. 2. I have illustrated four of these ribs T, but there may be three ribs or any other numberdesired. Y

There should be, however, at.,.least three, ribs to insure aperfect centering ot the nozzle when applied to the end of the tube. The extreme outside diameter ot the ring 2 is preferably less than the` diameter of the tube 9, so that the ends of the ribs 7 :torni the only obstruction in the annular passage which is formed into the tube around the edge of the nozzle. In order to prevent any possibility of the nozzle tipping in such a way that the butt edge thereof might pass into the interior of the tube, I provide the extremities of the ribs 7 with outwardly projecting toes or guards 10, which lie adjacent to the ends of the tub'e The hub 3 is internally threaded so as to receive a steam supply tube 12 and the tip 6 is formed with an orifice 13 communicating with a. conical chamber' 141 which directs the steam from the pipe 12 in an axial direction downv the tube. When the nozzle is iu use, the force ot the incoming steam entrains air through the openings S and through the arc shaped openings 8a, which are formed around the outer edge of the ring 2. This air tends to take the direction indicated by the arrows near the hub inf'Fig. 1', that is, the part ot the air current which strikes the cone 5 is deflected outwardly as indicated by arrows. And an annular air current is developed through the openings Sa passing parallel-to an near the inner face oit the tube as indicated by the arrows at this point- These air currents are very eltective in scouringdl-ie sides of the tubes to which the nozzle is applied.

l/Vhat l claim anddesire to secure by Letters Patent is 1. A nozzle ot the class described having a circu'mferentially continuous 'conical body, open at its large end, having outwardly dis posed projections adjacent to the large end adapted t0 seat/against the end of the tube,

'2. A. nozzle ot the class described5 having a substantially conical base wit-h'projections near the outer edge thereof adapted to seat l against the mouth of the tube to which said nozzle is applied, a hub connected with said base at the inner end of said nozzle, and having a threaded connection for attaching said nozzle to a steam supply pipe, said nozzle having openings between said hub and said base, through which the entrained air may pass, said hub having an opening I on the central axis thereof coinnninicating with said threaded connection and forward of said openings.

3. A nozzle for cleaning boiler tubes, coinprising a substantially conical base ring and a substantially conical hub, said hub having. threads to receive astearn supply pi e and a plurality of longitudinally dispose ribs onl the forward and outer faces of said hub and said base ring adapted to engage the lip of the tube to which the nozzle is applied, said hub being disposed forward of said ring whereby openings are formed between said ribs and between said ring and said hub to admit air.

4. A nozzle forcleaning out boiler tubes yhaving' a substantially conical base ring, the

outer diameter whereof is smaller than the diameter of the tube to which the nozzle is applied, said base ring having projections on the'outer face thereof adapted to seat on the lip of the tube, and guards forming eX- tensious of said projections adapted to prevent the edge of said base ring from passing into the interior of the tube.

5. A nozzle forl cleaning out boiler tubes having a substantially conical body open at its larve end and having a hub at its small end with an opening at the central axis thereof through which the steam may pass and adapted to be attached at said hub to a steam-supply tube, said body having a plurality of arch-shaped openings on the lateral surface thereof through which air may be entrained by the steam flowing through said central opening.

vSigned at New York, in the county of New York and State of New Yorlr this 23rd day of March A.. D. 1912.

HUGH CASSIDY. Witnesses:

A. M. PALMER, MERLE I. Sfr. JOHN. 

